Vacuum flanges are used for positioning.
For example, there is a method of installing oil cylinders called flange installation, which involves drilling four symmetrical holes around a rectangular prism, with a large hole in the middle that is the same as the outer diameter of the oil cylinder. The rectangular prism can be fitted onto the oil cylinder and welded together in other ways. The connection between the oil cylinder and other things is made by connecting the four holes around the rectangular prism, which can be called a flange.
What is the difference between the connection method of orifice flange and ordinary flange?
It is to fix two pipes, fittings or equipment on a flange first, add flange pads between the two flanges, and tighten them together with bolts to complete the connection.
Orifice flange is a type of orifice flowmeter that connects the orifice plate (the measuring part of the orifice flowmeter) to the pipeline. The two flanges fix the orifice plate in the middle and lead it to the differential pressure transmitter through the pressure point on the flange to measure the flow rate.
